@media(-webkit-min-device-pixel-ratio:1.5),(-min-device-pixel-ratio:1.5)
    .border-1px
        &::after
            -webkit-transform: scaleY(0.7)
            transform: scaleY(0.7)

@media(-webkit-min-device-pixel-ratio:2),(-min-device-pixel-ratio:2)
    .border-1px
        &::after
            -webkit-transform: scaleY(0.5)
            transform: scaleY(0.5)        

.clearfix
    display inline-block
    &:after
        display block
        content: '.'
        height: 0
        line-height: 0
        clear: both
        visibility: hidden